Watch: China's 'Dead Sea' Tranforms Into Rainbow - Here's Why

This ancient salt lake in China is home to a strange phenomenon. Every so often the lake will change colors as a reaction to extreme heat. Microbes in the lake multiply and give the water its bright hues, called an algal bloom. The lake is 500 million years old and it is so salty that some call it the “Dead Sea of China”. Humans can easily float on the salty water. But the blooms can also cause massive die-offs.

Watch: China's 'Dead Sea' Tranforms Into Rainbow - Here's Why

This ancient salt lake in China is home to a strange phenomenon. Every so often the lake will change colors as a reaction to extreme heat. Microbes in the lake multiply and give the water its bright hues, called an algal bloom. The lake is 500 million years old and it is so salty that some call it the “Dead Sea of China”. Humans can easily float on the salty water. But the blooms can also cause massive die-offs.